diff --git a/lib/include/srslte/interfaces/ue_interfaces.h b/lib/include/srslte/interfaces/ue_interfaces.h
index 7c1506cc8..82ff6caf1 100644
--- a/lib/include/srslte/interfaces/ue_interfaces.h
+++ b/lib/include/srslte/interfaces/ue_interfaces.h
@@ -213,7 +213,7 @@ public:
 class nas_interface_ue
 {
 public:
-  virtual void start_attach_request(srslte::proc_state_t* proc_result) = 0;
+  virtual void start_attach_request(srslte::proc_state_t* proc_result, srslte::establishment_cause_t cause_) = 0;
   virtual bool detach_request(const bool switch_off)                   = 0;
 };
 
diff --git a/srsue/hdr/stack/upper/nas.h b/srsue/hdr/stack/upper/nas.h
index f7b57d1ac..bd42bee49 100644
--- a/srsue/hdr/stack/upper/nas.h
+++ b/srsue/hdr/stack/upper/nas.h
@@ -60,7 +60,7 @@ public:
   bool     get_ipv6_addr(uint8_t* ipv6_addr);
 
   // UE interface
-  void start_attach_request(srslte::proc_state_t* result) final;
+  void start_attach_request(srslte::proc_state_t* result, srslte::establishment_cause_t cause_) final;
   bool detach_request(const bool switch_off) final;
 
   void plmn_search_completed(rrc_interface_nas::found_plmn_t found_plmns[rrc_interface_nas::MAX_FOUND_PLMNS],
diff --git a/srsue/src/stack/ue_stack_lte.cc b/srsue/src/stack/ue_stack_lte.cc
index 8a157296e..669d295da 100644
--- a/srsue/src/stack/ue_stack_lte.cc
+++ b/srsue/src/stack/ue_stack_lte.cc
@@ -167,7 +167,9 @@ void ue_stack_lte::stop_impl()
 bool ue_stack_lte::switch_on()
 {
   if (running) {
-    pending_tasks.try_push(ue_queue_id, task_t{[this](task_t*) { nas.start_attach_request(nullptr); }});
+    pending_tasks.try_push(ue_queue_id, task_t{[this](task_t*) {
+                             nas.start_attach_request(nullptr, srslte::establishment_cause_t::mo_data);
+                           }});
     return true;
   }
   return false;
diff --git a/srsue/src/stack/upper/nas.cc b/srsue/src/stack/upper/nas.cc
index 8a610cb96..0c952d7e2 100644
--- a/srsue/src/stack/upper/nas.cc
+++ b/srsue/src/stack/upper/nas.cc
@@ -307,7 +307,7 @@ void nas::timer_expired(uint32_t timeout_id)
     timers->get(t3411)->run();
   } else if (timeout_id == t3411) {
     nas_log->info("Timer T3411 expired: trying to attach again\n");
-    start_attach_request(nullptr);
+    start_attach_request(nullptr, srslte::establishment_cause_t::mo_sig);
   } else {
     nas_log->error("Timeout from unknown timer id %d\n", timeout_id);
   }
@@ -321,7 +321,7 @@ void nas::timer_expired(uint32_t timeout_id)
  * The function returns true if the UE could attach correctly or false in case of error or timeout during attachment.
  *
  */
-void nas::start_attach_request(srslte::proc_state_t* result)
+void nas::start_attach_request(srslte::proc_state_t* result, srslte::establishment_cause_t cause_)
 {
   nas_log->info("Attach Request\n");
   switch (state) {
@@ -382,7 +382,7 @@ void nas::start_attach_request(srslte::proc_state_t* result)
         }
       } else {
         nas_log->info("NAS is already registered but RRC disconnected. Connecting now...\n");
-        if (not rrc_connector.launch(this, srslte::establishment_cause_t ::mo_data, nullptr)) {
+        if (not rrc_connector.launch(this, cause_, nullptr)) {
           nas_log->error("Cannot initiate concurrent rrc connection procedures\n");
           if (result != nullptr) {
             *result = proc_state_t::error;
diff --git a/srsue/src/stack/upper/usim.cc b/srsue/src/stack/upper/usim.cc
index 1b1e29d59..2aa28da17 100644
--- a/srsue/src/stack/upper/usim.cc
+++ b/srsue/src/stack/upper/usim.cc
@@ -238,9 +238,7 @@ void usim::generate_as_keys(uint8_t *k_asme,
 {
 
   // Generate K_enb
-   security_generate_k_enb( k_asme,
-                            count_ul,
-                            k_enb);
+  security_generate_k_enb(k_asme, count_ul, k_enb);
 
   memcpy(this->k_asme, k_asme, 32);
 
diff --git a/srsue/test/upper/nas_test.cc b/srsue/test/upper/nas_test.cc
index 193327553..641bf91b0 100644
--- a/srsue/test/upper/nas_test.cc
+++ b/srsue/test/upper/nas_test.cc
@@ -144,7 +144,7 @@ public:
   bool switch_on() final
   {
     proc_state_t proc_result = proc_state_t::on_going;
-    nas->start_attach_request(&proc_result);
+    nas->start_attach_request(&proc_result, srslte::establishment_cause_t::mo_data);
     while (proc_result == proc_state_t::on_going) {
       usleep(1000);
     }